Valve.



N0.s57,84s. PATENTED JUNE 25,1907.

VALVE.

APBLIUATION FILED JUNE 2e. 190s.

UNITED STATES PATENT cerros.

GEORGE J. THOMAS, OF llATER-TOVVN, MASSACHUSETTS, ASSIGNOR TO CHARLES E. CHESTER, OF BOSTON, MASSACHUSETTS.

VALVE.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed June 26,1906. Serial No. 323,486.

T0 all/17mm it may concern:

Be it known that l, GEORGE J. THOMAS, of Watertown, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention relates to improvements in valves, and more particularly in that class of valves known to the trade as ball-cocks and it has for its objects to simplify the construction of such valves 5 to provide novel means whereby the valve will be automatically closed if the float or ball becomes detached from the valve; to provide novel and convenient means whereby the valve seat and washer may be easily removed and repaired, or replaced when necessary to provide means whereby any sediment may be quickly and easily removed from the valve casing; and to otherwise improve the valves of this class as will appear by the complete description herein contained.

The invention consists of' the novel constructions, arrangements and combinations of parts, substantially as hereinafterv described and set forth in the claims annexed hereto, and it is carried out substantially as illustrated on the accompanying drawing, which forms an essential part of this specilication, and whereon like characters of reference refer to like parts wherever they occur on the different parts of the drawing.

On the drawing: Figure 1 represents a central longitudinal section of my improved valve, applied to a tank or receptacle to automatically maintain a given level of the liquid in said tank or receptacle, and show-v ing the tank or receptacle in longitudinal section also. Fig. 2, represents a plan view of my improved valve with a portion of the float rod and the float broken off and renoved. Fig. 3, represents a cross section of the valve on the line A-B in Fig. 1 and showing the same on an enlarged scale from that of the other views.

The valve consists of a casing 1 having means as usual whereby it may be attached to the edge of a tank or receptacle 2 within which the level of the liquid is to be maintained by my improved valve. The casing 1 is also provided with the usual means, as the coupling 3, by which the exterior of the casing may be attached to a supply pipe and thereby put into communication with a suitable supply of liquid for the tank or receptacle. The casing isprovided with the inlet passage 4l, and a passage 5 extending at right angles and upward from the inlet 4. The casing is also provided with a passage 6 which is also at right angles but extending downward from the inlet passage. The diameter of the passage 5 is somewhat larger than the diameter ofthe passage 6.

Within the passage 5 is placed a piston 7 and within the passage 6 is placed the piston 8, the latter fitting liquid tight within the pas sage and the former, being provided with grooves or cutaway portions Q which will allow of a limited quantity of liquid to pass the piston. The pistons 7 and 8 are free to reciprocate within their respective passages and are connected by the piston-rod 10 so that they will move vin unison. The upper surface of the piston 7 is provided with the washer 1 1 forming a valve thereon.

The passage 5 forms the outlet passage for the casing and has a tubular extension 12 detachably attached to the casing', preferably by means ofthe coupling 13 and so as to ccmmunicate with the passage 5. The end of the extension 12 extends into the passage 5 of the casing, and its extreme end forms the seat le for the valve 1 l and in connection with said valve controls communication between the passage 5 and the extension 12.

The piston rod 10 extends through the passage 6 and below the casing, where it is preferably forked and embraces the float rodf15 pivotally attached at 16 to the casing 1 and provided at its outer end with a suitable float 17. The lower end of the forked end of the piston rod is provided with a removable pin 18 which prevents the fioat rod from withdrawing from the fork in the piston rod, but which may be removed when it is desired to disconnect the parts.

From the above description it will be seen that the pistons 7 and 8 may be reciprocated within the respective passages 5 and 6 by an up and down movement of the float rod upon its fulcrum, and by this reciprocating movements of said piston, that the valve may be seated or withdrawn from its seat on the end of the extension 12, thus opening or closing communication between the passage 5'and the extension 12. The float, the valve, and connecting mechanism are so related to each other that when the liquid has risen to the desired level in the receptacle and caused the float to rise to a position substantially as IOO shown in Fig. 1, it will have turned the float rod on its fulcrum sufficiently to have seated the valve upon its seat, but when the liquid has lowered within the receptacle and allowed the weight of the float to turn the float rod downward upon its fulcrum, it will cause the valve to be withdrawn from the valve seat and thereby open communication between the passage 5 and the extension 12 allowing the liquid from the supply pipe to pass through the inlet passage 4, outlet passage 5, through the cutaway passages in the piston 7 and through the extension `12 into the tank or receptacle thereby causing the level of the liquid therein to return to that shown in Fig. l, and the valve to again close.

As the unbalanced area of the piston 7 is somewhat larger in diameter than the piston 8 and as they are both acted upon by the same pressure of the liquid in the inlet pas-v sage but are acted upon by saidliquid tending to move them in opposite directions, it will be understood that its influence on the larger piston will overcome that on the smaller piston and will normally tend to move the piston 7 upward so as to cause the closing of the valve 11 independent of the action of the float upon said pistons, but the weight of the float when unsupported is such as to over come this surplus upward pressure on the piston 7 and therefore draws the valve and valve rod downward su'liiciently to open the valve. By this action of the pressure of the liquid tending to close the valve independent of the float, it will be seen that the valve would automatically close or remain closed even. when the oat became useless or was detached from its ioat rod, consequently there is no liability of overflowing the tank or receptacle.

lf the valve becomes leaky and requires a renewal of the valve washer or the regrinding or leveling of the valve seat 14, it is only necessary to disconnect the extension 12 from the valve casing causing easy access to such parts as the seat is thereby removed and the washer may be easily reached by, a screwdriver or other suitable instrument. This leaves the remaining parts of the valve assembled and in their proper relative positions.

In order to be able to easily remove any accumulation of sediment from the interior of the casing 1, l may provide the casing above the piston 8, with a perforation 19 and control said perforation with a suitable plug or screw 20 and it will be seen that by this means I am able to wash the accumulated sediment from the interior of the casing simply by removing the screw or plug 20, allowing an unobstructed flow of the liquid and the sediment through the perforation 19.

Having thus fully described the nature, construction and operation of my invention, l wish to secure by Letters Patent and to claim:

1. ln a valve, a casing having an inlet passage, two passages of different areas and at right angles to the inlet passage the larger passage forming the outlet passage of the casing, pistons in the latter passages of different areas, both acted upon by pressure within said casing, a piston rod connecting said pistons, a valve within the larger passage carried by the larger piston normally held upon its seat by excess of pressure upon the larger piston, a seat for said valve, and means to allow of the withdrawal of the valve from its seat when desired to open the valve.

2. In a valve, la casing having an inlet passage, two passages of different areas and at right angles to the inlet passage the larger passage forming the outlet passage of the casing, pistons in the latter passages of different areas, both acted upon by pressure within said casing, a piston rod connecting said pistons, a valve within the larger passage carried by the larger piston normally held upon its seat by the excess of pressure upon the larger piston, a seat for said valve, afloat rod fulcrumed to said casing and engaging said piston rod, and a float on the free end of said rod, whereby the valve is withdrawn from its seat or allowed to be seated dependent upon the position of said float.

In testimony whereof I have aHiXed my signature, in presence of two witnesses.

GEORGE J. THOMAS.

Vitnesses:

HENRY CHADBOURN, GEORGE K. LiTTLEFIELD. L 

